Section 43 of the Special Marriage Act, 1954 applies where a person:

Section 43 applies to "every person who, being at the time married, procures a marriage of himself or herself to be solemnized under this Act", and the marriage so solemnized is void. A person married under the Act who later marries again falls under section 44 instead, and registering one's own existing marriage under Chapter III is expressly saved.